/Engine/Source/Runtime/Engine/Classes/Particles/ParticleModule.h
Retreive the random stream that should be used for the provided instance.FRandomStream& The random stream to use for the provided instance.
[FRandomStream](API\Runtime\Core\Math\FRandomStream) & GetRandomStream ( [FParticleEmitterInstance](API\Runtime\Engine\FParticleEmitterInstance) * Owner )